The Michael reaction, with conjugate bases of β-diketones as donors and with α,β-unsaturatedketones as acceptors, is efficiently catalyzed by a combination of clay-supported nickel bromide (heterogeneous) and ferric chloride (homogeneous).
ZrCl<sub>4</sub>-Catalyzed Michael Reaction of 1,3-Dicarbonyls and Enones under Solvent-Free Conditions
作者:Ch. Reddy、G. Smitha、Sujatha Patnaik
DOI:10.1055/s-2005-861837
日期:——
ZrCl4 has been found to catalyze the conjugate addition of 1,3-dicarbonyl compounds with enones. The reaction does not require any solvent and proceeds smoothly at room temperature leading to the corresponding adduct in good yields.
New Application of 1,4-Dihydropyridine System: Michael Reactions Mediated by 1,4-Dihydropyridine–Enolate Adduct in Micellar Medium
作者:Sabir H. Mashraqui、Madhavi A. Karnik
DOI:10.1246/cl.2003.1064
日期:2003.11
1,4-dihydropyridine-acetophenone enolate adduct, in catalytic amount effects Michael reactions in aqueous cationic micelles of cetyltrimethylammonium bromide. The enolate, generated by dissociation of the adduct abstracts a proton from readily enolizable substrates to bring about the Michael reaction under mild conditions in fair to good yields without side products.
Lanthanides in organic synthesis: Eu+3-catalyzed Michael addition of 1,3- dicarbonyl compounds
作者:Francesco Bonadies、Alessandra Lattanzi、Liliana R. Orelli、Silvia Pesci、Arrigo Scettri
DOI:10.1016/s0040-4039(00)60424-0
日期:1993.11
EuCl3 proves to be an efficient catalyst for Michael addition of 1,3-dicarbonyl compounds. The employment of Eu+3 chiral complex [Eu(tfc)3] allows the formation of Michael adducts in enantioselective way.
Baruah, Partha P.; Boruah, Anima; Prajapati, Dipak, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1998, vol. 37, # 5, p. 425 - 426
作者:Baruah, Partha P.、Boruah, Anima、Prajapati, Dipak、Sandhu, Jagir S.